| /* |
| * Copyright 2006 Sascha Weinreuter |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.intellij.lang.xpath; |
| |
| import com.intellij.codeInsight.CodeInsightBundle; |
| import com.intellij.codeInsight.lookup.LookupElement; |
| import com.intellij.lang.ASTNode; |
| import com.intellij.lang.parameterInfo.*; |
| import com.intellij.openapi.util.TextRange; |
| import com.intellij.psi.PsiElement; |
| import com.intellij.psi.PsiFile; |
| import com.intellij.psi.util.PsiTreeUtil; |
| import com.intellij.util.ArrayUtil; |
| import org.intellij.lang.xpath.context.functions.Function; |
| import org.intellij.lang.xpath.psi.XPathFunction; |
| import org.intellij.lang.xpath.psi.XPathFunctionCall; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| public class XPathParameterInfoHandler implements ParameterInfoHandler<XPathFunctionCall, XPathFunction> { |
| public boolean couldShowInLookup() { |
| return false; |
| } |
| |
| public Object[] getParametersForLookup(LookupElement lookupElement, ParameterInfoContext parameterInfoContext) { |
| return ArrayUtil.EMPTY_OBJECT_ARRAY; |
| } |
| |
| public Object[] getParametersForDocumentation(XPathFunction xPathFunction, ParameterInfoContext parameterInfoContext) { |
| return ArrayUtil.EMPTY_OBJECT_ARRAY; |
| } |
| |
| public XPathFunctionCall findElementForParameterInfo(@NotNull CreateParameterInfoContext context) { |
| final XPathFunctionCall call = findFunctionCall(context.getFile(), context.getOffset()); |
| if (call != null) { |
| final XPathFunction function = call.resolve(); |
| if (function != null && function.getDeclaration() != null) { |
| context.setItemsToShow(new Object[]{ function }); |
| } |
| } |
| return call; |
| } |
| |
| @Nullable |
| private static XPathFunctionCall findFunctionCall(PsiFile psiFile, int offset) { |
| PsiElement e = psiFile.findElementAt(offset); |
| while (e != null) { |
| final XPathFunctionCall call = PsiTreeUtil.getParentOfType(e, XPathFunctionCall.class); |
| if (call == null) { |
| break; |
| } |
| final ASTNode lparen = call.getNode().findChildByType(XPathTokenTypes.LPAREN); |
| if (lparen != null && lparen.getTextRange().getStartOffset() < offset) { |
| return call; |
| } |
| |
| e = PsiTreeUtil.getParentOfType(e, XPathFunctionCall.class, true); |
| } |
| return null; |
| } |
| |
| public void showParameterInfo(@NotNull XPathFunctionCall call, @NotNull CreateParameterInfoContext context) { |
| context.showHint(call, call.getTextOffset() + 1, this); |
| } |
| |
| public XPathFunctionCall findElementForUpdatingParameterInfo(@NotNull UpdateParameterInfoContext context) { |
| return findFunctionCall(context.getFile(), context.getOffset()); |
| } |
| |
| public void updateParameterInfo(@NotNull XPathFunctionCall call, @NotNull UpdateParameterInfoContext context) { |
| int currentParameterIndex = ParameterInfoUtils.getCurrentParameterIndex(call.getNode(), context.getOffset(), XPathTokenTypes.COMMA); |
| context.setCurrentParameter(currentParameterIndex); |
| } |
| |
| public String getParameterCloseChars() { |
| return "(,)"; |
| } |
| |
| public boolean tracksParameterIndex() { |
| return true; |
| } |
| |
| public void updateUI(XPathFunction function, @NotNull ParameterInfoUIContext context) { |
| final Function declaration = function.getDeclaration(); |
| if (declaration != null) { |
| if (declaration.getParameters().length > 0) { |
| final String signature = declaration.buildSignature(); |
| final int length = declaration.getName().length(); |
| final String hint = signature.substring(length + 1, signature.length() - 1); |
| final int currentParameterIndex = context.getCurrentParameterIndex(); |
| |
| if (currentParameterIndex < 0 || currentParameterIndex >= declaration.getParameters().length) { |
| context.setupUIComponentPresentation(hint, -1, -1, |
| false, false, false, context.getDefaultParameterColor()); |
| } else { |
| final String[] ps = hint.split(","); |
| final TextRange[] ts = new TextRange[ps.length]; |
| |
| int start = 0; |
| for (int i = 0; i < ps.length; i++) { |
| String p = ps[i]; |
| ts[i] = TextRange.from(start, p.length()); |
| start += p.length() + 1; |
| } |
| final TextRange range = ts[currentParameterIndex]; |
| context.setupUIComponentPresentation(hint, range.getStartOffset(), range.getEndOffset(), |
| false, false, false, context.getDefaultParameterColor()); |
| } |
| } else { |
| context.setupUIComponentPresentation(noParamsMessage(), -1, -1, |
| false, false, false, context.getDefaultParameterColor()); |
| } |
| } |
| } |
| |
| @SuppressWarnings({ "UnresolvedPropertyKey" }) |
| private static String noParamsMessage() { |
| return CodeInsightBundle.message("parameter.info.no.parameters"); |
| } |
| } |